#include <my_head.h>

int main(int argc, const char *argv[]){
    FILE *fp = fopen("hello.txt", "w+");
    if(NULL == fp)
        ERR_LOG("fopen error");
    // 6.缓冲区满 会刷新
    for(int i = 0; i < 4097; i++){
        fputc('A', fp);
    }
    while(1);
    
    return 0;
}